09 Feb 2021 --- A low-fat vegan diet is more effective in producing weight loss than a Mediterranean diet. This is according to a study from the US-based nonprofit Physicians Committee for Responsible Nutrition (PCRN), which aims to “save and improve human and animal lives through plant-based diets.” “Because the Mediterranean diet is often touted for weight loss, it was surprising to see that participants experienced minimal changes – if any at all – when it came to their weight on this diet,” Hana Kahleova, director of clinical research at PCRN, tells NutritionInsight.